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HABAU GROUP company ÖSTU-STETTIN is implementing a floating company headquarters for the waterway operator “via donau” on the bank of Vienna’s Danube river.
An extraordinary construction project is currently taking shape at Vienna Handelskai, in a form and dimension that has never before been seen. With structural engineering costs of 16.6 million euros, ÖSTU-STETTIN Hoch- und Tiefbau GmbH is constructing a floating head office for leading international waterway operator via donau – Österreichische Wasserstraßen-Gesellschaft mbH. As the general contractor, ÖSTU-STETTIN, a company of the HABAU GROUP, is responsible for the implementation of this innovative project, which in future will provide a workplace for around 120 via donau, water police and shipping inspectorate employees. Overall completion is scheduled for March 2027.
“This construction project is an impressive display of what HABAU GROUP stands for: innovative strength, technical expertise and the courage to explore new horizons”, says Hubert Wetschnig, CEO of HABAU GROUP. “With the ‘floating company headquarters’ for via donau, our Group company ÖSTU-STETTIN is implementing a construction project that is as yet unparalleled in Austria. We are delighted to be bringing our many years of experience and expertise to this exceptional project and would like to thank our client for their trust.”
Building on water: precision under special circumstances
The floating building is to be erected on a specially designed pontoon of shipbuilding steel around 103 metres long and 21 metres wide, which will also serve as a basement and technical control room. Onto this, reaching a height of approx. eleven metres, a two-storey office building with a sun deck will be built using modern steel/timber composite construction. The project is architecturally reminiscent of a modern ship. The external optics are characterised by aluminium and wooden façade elements, while the interior features high-quality wood surfaces and generous windows to create a bright and open atmosphere. The façades along with the structural timberwork are to be implemented by the company BAUMGARTNER Raimund GmbH, a subsidiary of ÖSTU-STETTIN. Also planned are five access bridges as well as a dedicated boat landing stage for the rescue organisations.
The structure is currently being built at a temporary mooring point at the Lagerhauslände, a public berth for commercial shipping in Vienna. The construction requires the utmost precision: the site lies directly over the flowing water, meaning that increased safety and official regulations have to be observed. Accordingly, the majority of the structural elements will be prefabricated and implemented using the assembly method. Upon completion of construction, the finished office ship will be transported upstream towards the Praterlände to its final location by the Vienna Reichsbrücke, where it will be permanently anchored.
Showcase project that sends a signal to the construction industry
Beyond this, the office ship will set new standards for sustainable construction: along with climate-neutral construction technology and innovative systems for energy generation and heat production from the Danube water, photovoltaic modules will also be installed on the roof.
For ÖSTU-STETTIN, the construction project on the water represents an innovative step in the evolution of its range of services and shows how innovative construction methods, sustainable materials and complex infrastructure can be blended to create a functioning all-round solution.
“The ‘floating company headquarters’ for via donau is an exceptional project and showcases the broad competence of ÖSTU-STETTIN very well. Here, the construction materials of steel, timber and concrete are combined in a special manner – all under demanding conditions on the water. This makes it an even greater honour to implement the floating office building, giving us the opportunity to prove our ability when it comes to complex construction projects”, says Robert Hitschmann, technical director of ÖSTU-STETTIN.
